Lewis & Short

pŏsĭtīvus, a, um, adj. [pono], positive, in gram.

  1. I. Settled by arbitrary appointment or agreement (opp. to natural): nomina non positiva esse sed naturalia, Gell. 10, 4 in lemm.
  2. II. Positivum nomen.
      1. 1. An adjective in the positive degree, Cledon. p. 1893 P.
      2. 2. A substantive, Macr. S. 1, 4, 9.